The statements refer to the disease tuberculosis (TB).
1 The pathogen lives inside human cells so is not accessible to the immune system.
2 The bacterial pathogen reproduces slowly.
3 The pathogen is not very sensitive to antibiotics.
Which explains why antibiotic treatment for TB takes a long time?
1 )
1, 2 and 3
2 )
1 and 2 only
3 )
1 and 3 only
2 and 3 only
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